Prolapsed pedunculated lipoma: a cause of rectosigmoid intussusception

Area of Science:

• Gastroenterology
• Colorectal Surgery

Background:

• Colonic lipomas are rare, benign tumors of the colon.
• Intussusception of a colonic lipoma into the rectum can present as a prolapsed anal mass.

Purpose of the Study:

• To report a case of sigmoid colon lipoma intussuscepting into the rectum and presenting as a prolapsed anal mass.
• To highlight the diagnostic and management approach for this rare condition.

Main Methods:

• Case report of a male patient in his early 30s.
• Diagnostic imaging included contrast-enhanced CT of the abdomen and pelvis.
• Management involved flexible sigmoidoscopy and mass excision.
• Histopathological examination for diagnosis confirmation.

Main Results:

• A 4.4 cm lipomatous mass originating from the sigmoid colon was found to have intussuscepted into the rectum and anus.
• The patient presented with a prolapsed anal mass, rectal bleeding, and lower abdominal pain.
• Successful management with flexible sigmoidoscopy and excision was achieved.

Conclusions:

• Colonic lipoma intussusception is a rare cause of prolapsed anal mass.
• CT imaging is crucial for diagnosis.
• Flexible sigmoidoscopy and excision offer a successful treatment option.